View source for ML19133A091

{{Adams
| number = ML19133A091
| issue date = 04/22/2019
| title = Supplement to Containment Oxygen Concentration License Amendment Request
| author name = Marshall M
| author affiliation = NRC/NRR/DORL/LPLI
| addressee name = Hanson B
| addressee affiliation = Exelon Generation Co, LLC, Exelon Nuclear
| docket = 05000220, 05000410
| license number = DPR-063, NPF-069
| contact person = Marhsall M, NRR/DORL/LPL, 415-2871
| case reference number = EPID L-2018-LLA-0183
| package number = ML19133A103
| document type = Meeting Briefing Package/Handouts, Slides and Viewgraphs
| page count = 3
| project = EPID:L-2018-LLA-0183
| stage = Other
}}

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{{#Wiki_filter:Nine Mile Point Nuclear Station Unit 1 Supplement to Containment Oxygen Concentration License Amendment Request

Change summary
* Revise Applicability to be in the power operating condition
* Simplify Specification 3.3.1.a - shall be inert (less then 4% by volume Oxygen concentration)
* Remove existing Specification 3.3.1.b, which allowed containment to be de-inert during startup
* Revise existing Specification 3.3.1.c:
  -Re-number to 3.3.1.b
  -Clarify the specification is for transitory conditions during startup, shutdown and maintenance activities
  -Limits to 72 hours total (basis on next slide)
  -Removes references to power levels
* Revise existing Specification d:
  -Re-number to 3.3.1.c
  -Requires exiting the power operating condition within 12 hours if Specification a or b are not met 1   Supplement to NMP1 Containment Oxygen Concentration Submittal

Completion time change to 72 hours
* De-inert the primary containment while reducing power to permit containment entry (24 hours)
(existing allowance),
* Perform on-line maintenance in containment (24 hours), and
* Re-inert the primary containment while increasing to full power (24 hours) (existing allowance).
2 Supplement to NMP1 Containment Oxygen Concentration Submittal}}